A 24-hour blood pressure monitor is useful to monitor a patient’s overall blood pressure for 24 hours to assess whether the patient is currently hypertensive and the severity of the current hypertension. This test is also a very important test that is widely used in clinical practice to confirm hypertension and to assess whether the current blood pressure control is stable. Because some patients may have hypertension when their blood pressure is measured in the clinic, but their blood pressure is often normal when they measure it at home, called white coat hypertension, then ambulatory blood pressure monitoring can help avoid white coat hypertension or other stressful factors that may cause the blood pressure to rise, and can objectively assess what kind of blood pressure is present, so this is exactly why it is more widely used in clinical practice. This is the reason why it is more widely used in clinical practice. When doing this test, it is important not to sit or lie down all the time, but to maintain a normal lifestyle.